/[winpt]/trunk/Src/wptNLS.c
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Annotation of /trunk/Src/wptNLS.c

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Revision 205 - (hide annotations)
Thu Apr 27 12:46:03 2006 UTC (18 years, 10 months ago) by twoaday
File MIME type: text/plain
File size: 10219 byte(s)
2006-04-27  Timo Schulz  <ts@g10code.de>
                                                                                
        * wptKeyManager.cpp (km_get_key_ptr): New.
        * wptListview.cpp (listview_get_item_text): Drop utf8 support.
        * wptKeyCache.cpp (keycache_decode_uids): New.
        (free_native_uids): New.
        * wptKeyEdit.cpp (uid_inf_colon_handler): Do utf8 decodig here.
                                                                                
2006-04-26  Timo Schulz  <ts@g10code.de>
                                                                                
        * wptKeylist.cpp (get_keyid_from_fpr): New.
        * wptDecryptClipDlg.cpp (clip_decrypt_dlg): Use it here.
        * wptVerifyList.cpp (verlist_add_sig): Likewise.


1 werner 36 /* wptNLS.cpp - W32 Native Language Support
2 twoaday 176 * Copyright (C) 2001, 2002, 2003, 2006 Timo Schulz
3 werner 36 * Copyright (C) 1995-1999 Free Software Foundation, Inc.
4     *
5     * This code based on the simple-gettext.c code from the GnuPG
6     * by Ulrich Drepper.
7     *
8     * WinPT is free software; you can redistribute it and/or
9     * modify it under the terms of the GNU General Public License
10     * as published by the Free Software Foundation; either version 2
11     * of the License, or (at your option) any later version.
12     *
13     * WinPT is distributed in the hope that it will be useful,
14     * but WITHOUT ANY WARRANTY; without even the implied warranty of
15     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16     * General Public License for more details.
17     *
18     * You should have received a copy of the GNU General Public License
19     * along with WinPT; if not, write to the Free Software Foundation,
20     * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21     */
22    
23     #ifdef HAVE_CONFIG_H
24     #include <config.h>
25     #endif
26    
27     #include <stdio.h>
28     #include <string.h>
29     #include <ctype.h>
30     #include <errno.h>
31     #include <sys/types.h>
32     #include <sys/stat.h>
33     #include <windows.h>
34    
35     #include "wptNLS.h"
36    
37 twoaday 176
38 werner 36 /* The magic number of the GNU message catalog format. */
39     #define MAGIC 0x950412de
40     #define MAGIC_SWAPPED 0xde120495
41    
42     /* Revision number of the currently used .mo (binary) file format. */
43     #define MO_REVISION_NUMBER 0
44    
45 twoaday 193 #define SWAPIT(flag, data) ((flag) ? do_swap_u32(data) : (data) )
46 werner 36
47 twoaday 193
48     /* We assume to have `unsigned long int' value with at least 32 bits. */
49     #define HASHWORDBITS 32
50    
51 werner 36 /* Header for binary .mo file format. */
52     struct mo_file_header {
53 twoaday 193 DWORD magic; /* The magic number. */
54     DWORD revision; /* The revision number of the file format. */
55     DWORD nstrings; /* The number of strings pairs. */
56     DWORD orig_tab_offset; /* Offset of table with start offsets of original
57     strings. */
58     DWORD trans_tab_offset; /* Offset of table with start offsets of translation
59     strings. */
60     DWORD hash_tab_size; /* Size of hashing table. */
61     DWORD hash_tab_offset; /* Offset of first hashing entry. */
62 werner 36 };
63    
64     struct string_desc {
65 twoaday 193 DWORD length; /* Length of addressed string. */
66     DWORD offset; /* Offset of string in file. */
67 werner 36 };
68    
69     struct loaded_domain {
70     char *data;
71     int must_swap;
72 twoaday 193 DWORD nstrings;
73 werner 36 char *mapped;
74     struct string_desc *orig_tab;
75     struct string_desc *trans_tab;
76 twoaday 193 DWORD hash_size;
77     DWORD *hash_tab;
78 werner 36 };
79    
80 twoaday 193 /* List of all available languages. */
81     struct lang_table_s lang_list[] = {
82     {"en", "English", LANG_ENGLISH},
83     {"de", "German", LANG_GERMAN},
84     {"fr", "French", LANG_FRENCH},
85     {"jp", "Japanese", LANG_JAPANESE},
86     {NULL, 0}
87     };
88    
89     /* The current domain. */
90 werner 36 static struct loaded_domain *the_domain;
91    
92 twoaday 193
93     static DWORD
94     do_swap_u32 (DWORD i)
95 werner 36 {
96 twoaday 193 return (i << 24) | ((i & 0xff00) << 8) | ((i >> 8) & 0xff00) | (i >> 24);
97 werner 36 }
98    
99    
100 twoaday 205 /* The so called `hashpjw' function by P.J. Weinberger
101     [see Aho/Sethi/Ullman, COMPILERS: Principles, Techniques and Tools,
102     1986, 1987 Bell Telephone Laboratories, Inc.] */
103 werner 36
104 twoaday 193 static DWORD
105     hash_string (const char *str_param)
106 werner 36 {
107     unsigned long int hval, g;
108     const char *str = str_param;
109    
110     hval = 0;
111     while (*str != '\0') {
112     hval <<= 4;
113     hval += (unsigned long int) *str++;
114     g = hval & ((unsigned long int) 0xf << (HASHWORDBITS - 4));
115     if (g != 0) {
116     hval ^= g >> (HASHWORDBITS - 8);
117     hval ^= g;
118     }
119     }
120     return hval;
121 twoaday 193 }
122 werner 36
123 twoaday 205 /* Missing W32 functions. */
124     static char*
125     w32_stpcpy (char *a,const char *b)
126     {
127     while (*b)
128     *a++ = *b++;
129     *a = 0;
130     return (char*)a;
131     }
132 werner 36
133 twoaday 205
134    
135 werner 36 static struct loaded_domain *
136     load_domain( const char *filename )
137     {
138     FILE *fp;
139     size_t size;
140     struct stat st;
141     struct mo_file_header *data = NULL;
142     struct loaded_domain *domain = NULL;
143     size_t to_read;
144     char *read_ptr;
145    
146     fp = fopen( filename, "rb" );
147     if( !fp )
148     return NULL; /* can't open the file */
149     /* we must know about the size of the file */
150     if( fstat( fileno(fp ), &st )
151 twoaday 193 || (size = (size_t)st.st_size) != (size_t)st.st_size
152 werner 36 || size < sizeof (struct mo_file_header) ) {
153     fclose( fp );
154     return NULL;
155     }
156    
157     data = (struct mo_file_header *) malloc( size );
158     if( !data ) {
159     fclose( fp );
160     return NULL; /* out of memory */
161     }
162    
163     to_read = size;
164     read_ptr = (char *) data;
165     do {
166 twoaday 193 size_t nb = fread( read_ptr, 1, to_read, fp );
167 werner 36 if( nb < to_read ) {
168     fclose (fp);
169     free(data);
170     return NULL; /* read error */
171    
172     }
173     read_ptr += nb;
174     to_read -= nb;
175     } while( to_read > 0 );
176     fclose (fp);
177    
178     /* Using the magic number we can test whether it really is a message
179     * catalog file. */
180     if( data->magic != MAGIC && data->magic != MAGIC_SWAPPED ) {
181     /* The magic number is wrong: not a message catalog file. */
182     free( data );
183     return NULL;
184     }
185    
186     domain = (struct loaded_domain *)calloc( 1, sizeof *domain );
187     if( !domain ) {
188     free( data );
189     return NULL;
190     }
191     domain->data = (char *) data;
192     domain->must_swap = data->magic != MAGIC;
193    
194     /* Fill in the information about the available tables. */
195     switch( SWAPIT(domain->must_swap, data->revision) ) {
196     case 0:
197     domain->nstrings = SWAPIT(domain->must_swap, data->nstrings);
198     domain->orig_tab = (struct string_desc *)
199     ((char *) data + SWAPIT(domain->must_swap, data->orig_tab_offset));
200     domain->trans_tab = (struct string_desc *)
201     ((char *) data + SWAPIT(domain->must_swap, data->trans_tab_offset));
202     domain->hash_size = SWAPIT(domain->must_swap, data->hash_tab_size);
203 twoaday 193 domain->hash_tab = (DWORD *)
204 werner 36 ((char *) data + SWAPIT(domain->must_swap, data->hash_tab_offset));
205     break;
206    
207     default: /* This is an invalid revision. */
208     free( data );
209     free( domain );
210     return NULL;
211     }
212    
213     /* allocate an array to keep track of code page mappings */
214     domain->mapped = (char *)calloc( 1, domain->nstrings );
215     if( !domain->mapped ) {
216     free( data );
217     free( domain );
218     return NULL;
219     }
220    
221     return domain;
222     } /* load_domain */
223    
224    
225 twoaday 193 /* Set the file used for translations. Pass a NULL to disable translation.
226     A new filename may be set at anytime. */
227 werner 36 int
228     set_gettext_file( const char *filename, const char *nls_dir )
229     {
230     struct loaded_domain *domain = NULL;
231    
232     if( filename && *filename ) {
233     if( filename[0] == '/'
234     || ( isalpha(filename[0])
235     && filename[1] == ':'
236     && (filename[2] == '/' || filename[2] == '\\') )
237     ) {
238     /* absolute path - use it as is */
239     domain = load_domain( filename );
240     }
241     else { /* relative path - append ".mo" and get dir from the environment */
242     char *buf = NULL;
243     char *dir;
244    
245     dir = strdup( nls_dir );
246     if( dir && (buf= (char *)malloc(strlen(dir)+strlen(filename)+1+3+1)) ) {
247 twoaday 69 strcpy(w32_stpcpy(w32_stpcpy(w32_stpcpy( buf, dir),"/"), filename),".mo");
248 werner 36 domain = load_domain( buf );
249     free(buf);
250     }
251     free(dir);
252     }
253     if( !domain )
254     return -1;
255     }
256    
257     if( the_domain ) {
258     free( the_domain->data );
259     free( the_domain->mapped );
260     free( the_domain );
261     the_domain = NULL;
262     }
263     the_domain = domain;
264     return 0;
265 twoaday 193 }
266 werner 36
267    
268     static const char*
269 twoaday 193 get_string( struct loaded_domain *domain, DWORD idx )
270 werner 36 {
271     char *p = domain->data + SWAPIT(domain->must_swap,
272     domain->trans_tab[idx].offset);
273     if( !domain->mapped[idx] ) {
274     domain->mapped[idx] = 1;
275     }
276     return (const char*)p;
277 twoaday 193 }
278 werner 36
279 twoaday 193
280 werner 36 const char *
281     gettext( const char *msgid )
282     {
283     struct loaded_domain *domain;
284     size_t act = 0;
285     size_t top, bottom;
286    
287 twoaday 205 if (!(domain = the_domain))
288 werner 36 goto not_found;
289    
290     /* Locate the MSGID and its translation. */
291     if( domain->hash_size > 2 && domain->hash_tab ) {
292     /* Use the hashing table. */
293 twoaday 193 DWORD len = strlen (msgid);
294     DWORD hash_val = hash_string (msgid);
295     DWORD idx = hash_val % domain->hash_size;
296     DWORD incr = 1 + (hash_val % (domain->hash_size - 2));
297     DWORD nstr = SWAPIT (domain->must_swap, domain->hash_tab[idx]);
298 werner 36
299     if ( !nstr ) /* Hash table entry is empty. */
300     goto not_found;
301    
302    
303     if( SWAPIT(domain->must_swap,
304     domain->orig_tab[nstr - 1].length) == len
305     && !strcmp( msgid,
306     domain->data + SWAPIT(domain->must_swap,
307     domain->orig_tab[nstr - 1].offset)) )
308     return get_string( domain, nstr - 1 );
309     for(;;) {
310     if (idx >= domain->hash_size - incr)
311     idx -= domain->hash_size - incr;
312     else
313     idx += incr;
314     nstr = SWAPIT(domain->must_swap, domain->hash_tab[idx]);
315     if( !nstr )
316     goto not_found; /* Hash table entry is empty. */
317    
318     if ( SWAPIT(domain->must_swap,
319     domain->orig_tab[nstr - 1].length) == len
320     && !strcmp (msgid,
321     domain->data + SWAPIT(domain->must_swap,
322     domain->orig_tab[nstr - 1].offset)))
323    
324     return get_string( domain, nstr-1 );
325     } /* NOTREACHED */
326     }
327    
328     /* Now we try the default method: binary search in the sorted
329     array of messages. */
330     bottom = 0;
331     top = domain->nstrings;
332     while( bottom < top ) {
333     int cmp_val;
334    
335     act = (bottom + top) / 2;
336     cmp_val = strcmp(msgid, domain->data + SWAPIT(domain->must_swap,
337     domain->orig_tab[act].offset));
338     if (cmp_val < 0)
339     top = act;
340     else if (cmp_val > 0)
341     bottom = act + 1;
342     else
343     return get_string( domain, act );
344     }
345    
346     not_found:
347     return msgid;
348     } /* gettext */
349    
350 twoaday 176
351 twoaday 193 /* Map the user specific language ID to a gettext conform language string.
352 twoaday 76 Example: LANG_GERMAN -> "de" */
353     const char*
354     get_gettext_langid (void)
355     {
356     LANGID lang;
357     int i;
358 twoaday 176
359 twoaday 76 lang = GetUserDefaultLangID ();
360 twoaday 193 if (PRIMARYLANGID (lang) == LANG_ENGLISH)
361     return NULL;
362 twoaday 176
363 twoaday 193 for (i=0; lang_list[i].id; i++) {
364     if (PRIMARYLANGID (lang) == lang_list[i].langid)
365     return lang_list[i].id;
366 twoaday 76 }
367     return NULL;
368     }
369 werner 36
370 twoaday 76
371 twoaday 176 /* Take a table with control item IDs and their translation
372     and set each text to the translated value. */
373     void
374     gettext_localize_dialog (HWND dlg, struct gettext_tab_s *tab,
375     const char *title)
376     {
377     int i;
378    
379     for (i=0; tab[i].trans != NULL; i++)
380     SetDlgItemText (dlg, tab[i].ctlid, tab[i].trans);
381     if (title)
382     SetWindowText (dlg, title);
383     }
384    
385    
386 werner 36 /* XXX: this has to be placed in a .c file but not here */
387     #include <shlobj.h>
388    
389     void _SHFree (void *p)
390     {
391     IMalloc *pm;
392     SHGetMalloc(&pm);
393     if (pm) {
394     pm->lpVtbl->Free(pm,p);
395     pm->lpVtbl->Release(pm);
396     }
397     }

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